Only Back Door Cannot Be Opened

DOOR LOCK: POWER DOOR LOCK CONTROL SYSTEM: Only Back Door cannot be Opened

Only Back Door cannot be Opened

DESCRIPTION

The instrument panel junction block (integration relay) receives switch signals from the driver/passenger side door control switch and activates the back door lock motor according to the signals.

WIRING DIAGRAM





INSPECTION PROCEDURE

PROCEDURE

1. INSPECT BACK DOOR LOCK ASSEMBLY





(a) Check the operation of the back door lock.
(1) Using a screwdriver, move the latch to the full-latch position.
(2) Apply battery voltage to the door lock terminals and check the operation of the latch.
OK:





(b) Measure the resistance of the courtesy switch connector.
Standard resistance:






NG -- REPLACE BACK DOOR LOCK ASSEMBLY
OK -- Continue to next step.
2. CHECK WIRE HARNESS BACK DOOR LOCK ASSEMBLY - INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY (INTEGRATION RELAY) AND BODY GROUND)





(a) Disconnect the B5 lock connector.
(b) Disconnect the I6 relay connector.
(c) Disconnect the 1A junction block connector.
(d) Measure the resistance of the wire harness side connectors.
Standard resistance:






NG -- REPAIR OR REPLACE HARNESS AND CONNECTOR
OK -- Continue to next step.
3. INSPECT BACK DOOR OPENER SWITCH ASSEMBLY





(a) Remove the back door opener switch.
(b) Measure the resistance of the switch.
Standard resistance:






NG -- REPLACE BACK DOOR OPENER SWITCH ASSEMBLY
OK -- Continue to next step.
4. CHECK WIRE HARNESS (BACK DOOR OPENER SWITCH ASSEMBLY - INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY (INTEGRATION RELAY) AND BODY GROUND)





(a) Disconnect the B6 switch connector.
(b) Disconnect the I6 relay connector.
(c) Measure the resistance of the wire harness side connectors.
Standard resistance:






NG -- REPAIR OR REPLACE HARNESS AND CONNECTOR
OK -- Continue to next step.
5. CHECK OPERATION OF INTEGRATION RELAY
(a) After replacing the integration relay with a normally functioning relay, check that the back door lock operates normally.
OK:
Back door look operates normally.
NG -- REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY
OK -- NORMAL (INTEGRATION RELAY)